Thermal Comfort Analyses in Naturally Ventilated Buildings

Open access


Global current requirement is to increase thermal comfort in residential and non residential buildings. A field survey was accomplished in a naturally ventilated university classroom in Bucharest, Romania, in winter and spring. Comfort parameters were measured and comfort questionnaires were distributed to the students. Questions were related to thermal sensation of the occupants. This paper compares the experimental results with the occupant’s response. It analyzes the variation of Predicted Mean Vote (PMV) and Predicted Percent of Dissatisfied (PPD) with temperature. It is made a comparison between PMV and thermal sensation vote. The results show PMV values different from Thermal Sensation Vote (TSV) values which means there is a poor approximation of indoor comfort. In conclusion the comfort parameters should be reviewed and should be proposed other evaluation methods. Possible explanations are discussed in relation with thermal regime of the buildings.

[1]. ASHRAE standard 55-2010. (2010). In: Thermal environmental conditions for human occupancy. ASHRAE Atlanta, GA.

[2]. EN 15251. (2007). Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics. Brussels: CEN (European Committee for Standardization).

[3]. EN ISO 7730. (2006). Ergonomics of the thermal environment - analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria.

[4]. Teli D., Jentsch M. F., James Patrick A. B., Bahaj AbuBakr S., (2012), “Field study on thermal comfort in a UK primary school ”, Proceedings of 7th Windsor Conference: The changing context of comfort in an unpredictable world Cumberland Lodge, Windsor, UK,. London: Network for Comfort and Energy Use in Buildings,

[5]. Burrati C., Ricciardi P. (2009). Adaptive analysis of thermal comfort in university classrooms: Correlation between experimental data and mathematical models, Building and Environment, The International Journal of Building Science and its Applications, ISSN 0360-1323, 44, (pp. 674-687).

[6]. Jung G. Y., Song S. K., Ahn Y. C., Oh G. S., Im Y. B. (2011). Experimental research on thermal comfort in the university classroom of regular semesters in Korea, Journal of Mechanical Science and Technology 25 (2) (pp. 503-512)

[7]. ASHRAE, Standard 55.(2004). Thermal Environmental Conditions for Human Occupancy. The American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE).

[8]. Yao R., Liu J., L B. (2010). Occupants’ adaptive responses and perception of thermal environment in naturally conditioned university classrooms, Applied Energy 87. (pp. 1015-1022)

[9]. C107-2005, Normativ privind calculul termotehnic al elementelor de constructie ale cladirilor, partea a 3-a - Normativ privind calculul performantelor termoenergetice ale elementelor de constructie ale cladirilor, Anexa D

[10]. Hoyt T., Schiavon S., Piccioli A., Moon D., Steinfeld K. (2013). CBE Thermal Comfort Tool, Center for the Built Environment, University of California Berkeley, (Accesed 30.04.2014)

[11]. I5-2010, Normativ pentru proiectarea, executarea si exploatarea instalatiilor de ventilare si climatizare, pp. 11

[12]. Administratia Nationala de Meteorologie, (pp.640) (Accesed 07.05.2014)

[13]. EnergyPlus Energy Simulation Software, Weather Data, (Accesed 07.05.2014)

Mathematical Modelling in Civil Engineering

The Journal of Technical University of Civil Engineering of Bucharest

Journal Information


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 65 65 24
PDF Downloads 23 23 13